Round Robin Calculator
How To Use This Calculator
The round robin calculator creates every possible parlay combination from your selections. Enter your odds, choose your parlay size, and see a full breakdown of each combination.
Enter the amount to wager on each individual parlay.
Select how many legs per parlay (2-pick, 3-pick, etc.).
Enter the odds for each selection. Minimum 3 selections required.
See every parlay combination, payout, and total profit.
What is a Round Robin Bet?
A round robin bet takes a group of selections and creates every possible parlay combination of a chosen size. Unlike a single parlay where one loss kills the entire bet, round robins let you win some parlays even if not all selections hit.
Think of it as insurance for your parlays. You pay more upfront (since you are placing multiple parlays), but you get protection against one or two selections losing.
Parlays = C(n, k) = n! / (k! × (n-k)!)Round Robin Combinations Reference
Number of parlays created for common round robin configurations.
| Selections | 2-pick | 3-pick | 4-pick | 5-pick |
|---|---|---|---|---|
| 3 | 3 | 1 | — | — |
| 4 | 6 | 4 | 1 | — |
| 5 | 10 | 10 | 5 | 1 |
| 6 | 15 | 20 | 15 | 6 |
| 8 | 28 | 56 | 70 | 56 |
Step-by-Step Round Robin Example
You have 4 selections at -110, +150, -130, and +120. You want $10 2-pick round robins.
Common Mistakes to Avoid
A $10 round robin with 6 selections in 2-picks creates 15 parlays — that is $150 total, not $10. Always check the total stake before placing your bet.
More selections means exponentially more parlays. 8 selections in 2-picks is 28 parlays. Keep your selection count manageable to control total stake.
Round robins do not reduce the sportsbook's edge — they just redistribute your risk. Each individual parlay still has the same vig. The EV of a round robin equals the sum of each parlay's EV.
Calculate how many selections need to win for you to break even. If you need 4 of 5 to hit just to break even, the risk/reward may not be worth it compared to straight bets.
Frequently Asked Questions
What is the difference between a round robin and a parlay?
A parlay is a single bet combining multiple selections where all must win. A round robin creates multiple smaller parlays from your selections. If one selection loses in a parlay, you lose everything. In a round robin, you only lose the parlays containing the losing selection.
How many selections do I need for a round robin?
You need at least 3 selections for a round robin (which creates 3 two-pick parlays). Most sportsbooks allow up to 8-12 selections, though the total number of parlays grows quickly.
Can I lose money on a round robin if most selections win?
Yes. Depending on the odds and parlay size, you might need most or all selections to win just to break even. Low-odds favorites in large round robins can result in a loss even with only one miss. Always check the breakeven point.
What is a “full cover” bet?
A full cover bet includes every possible parlay combination of every size from your selections, plus sometimes the individual straight bets. For example, a “Trixie” is a full cover on 3 selections (3 doubles + 1 treble). Round robins are a subset of full cover bets.
Are round robins a good strategy?
Round robins are useful when you have confidence in multiple selections but want protection against 1-2 losses. They are not a magic strategy — the expected value is the same as placing the individual parlays separately. The benefit is purely risk management.
Can I use round robins with player props?
Yes. Round robins work with any bet type — moneylines, spreads, totals, and player props. They are especially popular with player props where bettors have strong opinions on several selections but want to hedge against one missing.
Pro Tip: Keep It Small
The sweet spot for round robins is 3-4 selections in 2-pick parlays. This gives you meaningful protection (you can lose 1 selection and still profit) without the total stake spiraling out of control. Anything beyond 5 selections gets expensive fast.